<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      //检测本地电话号码
      function isLocalPhoneNumber(number) {
        var reg = /^([0-9]{3,4}-)[0-9]{8}$/;
        let result = reg.test(number);
        if (result) {
          console.log(number, "是本地电话");
        } else {
          console.log(number, "不是本地电话");
        }
      }
      isLocalPhoneNumber("010-12345678");
      isLocalPhoneNumber("0418-12345678");
      isLocalPhoneNumber("0418-123456789");
      isLocalPhoneNumber("04-12345678");
    </script>
  </body>
</html>
